10以内的加法+10以内的减法+10以内的加减混合+10以内连加+10以内连减+10以内加减混合+11~20的加减法+20以内加法（进位） 计算题
1.20 + 0 = 20
2.4 - 1 - 0 = 3
3.0 + 4 = 4
4.3 - 2 = 1
5.8 + 0 - 2 = 6
6.3 + 3 = 6
7.4 + 0 - 2 = 2
8.4 + 4 - 9 = -1
9.0 + 8 = 8
10.18 + 3 = 21
11.1 + 3 = 4
12.5 + 4 + 1 = 10
13.7 + 1 = 8
14.0 + 2 = 2
15.6 + 3 + 6 = 15
16.1 + 1 = 2
17.5 + 7 + 3 = 15
18.9 + 0 - 3 = 6
19.15 + 9 = 24
20.17 - 8 = 9
21.10 + 1 = 11
22.6 + 1 - 0 = 7
23.7 + 9 + 7 = 23
24.1 + 3 + 3 = 7
25.0 - 0 = 0
26.0 + 2 + 7 = 9
27.4 - 2 - 0 = 2
28.7 + 0 - 3 = 4
29.14 + 4 = 18
30.15 + 10 = 25
31.17 - 5 - 0 = 12
32.16 - 14 - 2 = 0
33.4 - 3 - 0 = 1
34.13 - 10 - 2 = 1
35.12 + 3 = 9
36.1 + 5 + 7 = 13
37.4 - 1 - 0 = 3
38.16 + 8 = 24
39.9 - 2 - 0 = 7